| Year | % Correct |
|---|---|
| 2020 | 96%
|
| 1976 | 92%
|
| 1992 | 88%
|
| 1980 | 84%
|
| 1960 | 80%
|
| 1796 | 76%
|
| 1800 | 76%
|
| 1912 | 76%
|
| 1932 | 76%
|
| 1824 | 72%
|
| 1828 | 72%
|
| 1836 | 72%
|
| 1888 | 72%
|
| 1892 | 72%
|
| 1840 | 68%
|